A scatter plot displays Iris flower measurements, plotting sepal length against petal length with a legend differentiating species by symbol shape. The visualization uses D3 v7’s `scaleLinear`, `scaleOrdinal`, `symbolsFill`, and custom axis and legend modules. Data loads from a CSV via `csvParse` and renders with `join` and `symbolGenerator`, while axes are built using `axisLeft` and `axisBottom`.